Sex Identification in Cattle, based on Amelogenin Gene

Sex identification is considered an important step in forensic sciences, wildlife and livestock breeding management. In the current experiment we used Amelogenin gene as a biological marker for polymerase chain reaction test to identify the sex of cattle from blood remnants, collected at slaughter house. Due to the conserved region of the gene on both sex chromosomes (X and Y) a single primers pair was employed to amplify the gene in a single polymerase chain reaction. In case of band patterns, a 178 base pair fragment for AMELY and a 241 base pair fragment for AMELX genes were produced. The primer competence and exactness was initially checked on known gender cattle samples and then applied to unknown cattle samples for the validation of the experiment. PCR amplicons of unknown gender showed only one band (241-bp) for female DNA and two bands (241-bp, 178-bp) for male DNA, on the platform of agarose gel upon electrophoresis. Our findings showed that the PCR protocol based on AMELX or Y gene is a reliable technique for the identification of cattle sex.

Potential Use of Cell Free Fetal DNA at 13 Short Tandem Repeats Loci for Noninvasive Prenatal Paternity Test

Background : Prenatal paternity test is mostly performed by using Amniocentesis or Chorionic Villus Sampling (CVS) methods. However, these methods require invasive procedures, which are potentially harmful for both the mother and the fetus. Currently, the invention of of Cell-Free Fetal DNA (cffDNA) has offered the opportunity of performing prenatal paternity test non-invasively. Materials and Methods : This study is a cross sectional descriptive study to detect cell free fetal DNA at 13 STR loci and at amelogenin gene to evaluate fetus gender, which will be compared to the baby gender afterbirth. Healthy third semester pregnant women were included as participants. Inform consent for both the mother and the biological father has been provided. Result : Four participants has been evaluated. In this study, in all participants, we found the presence of cffDNA in almost all of the STR loci. Some loci cannot be detected due to the small amount of cffDNA in the loci. All fetus genders detected by cffDNA in the amelogenin gene macthed the gender of the four babies afterbirth. Conclusion : The use of Cell-Free Fetal DNA (cffDNA) is a potential non-invasive methods in prenatal paternity test. Additionally, the ability of the method to evaluate fetus gender has been suggested.

Spot Urine for Sex Determination Forensic Identifications with Amelogenin Locus and Y chromosomes (DYS 19). Bercak Urin untuk Identifikasi Forensik Jenis Kelamin dengan Lokus Amelogenin dan Y Kromosom (DYS19)

Background: Amelogenin gene was a single copy gene located in an X chromosome and a Y chromosome. The location of amelogenin gene for identification of sex chromosome has good variability between the form and the shape of the X chromosome and the Y chromosome and between Amelogenin alleles among different populations. Purpose: To prove urine spot examination on the results of the sex determination through Deoxyribo Nucleid Acid (DNA) isolation using amelogenin and Y chromosome loci (DYS19). Methods: Spotting the microscopic examination of urine samples to determine the presence or absence of urethral epithelial cells, followed by isolation Deoxyribo nucleid Acid (DNA) in order to determine the extent and purity of DNA amplification. Then performed Polymerase Chain Reaction (PCR) amelogenin locus at 106bp - 112bp and Y chromosomes (DYS19) at 232 -268 bp. Results: in 9 samples of men from 3 families with 3 kinship of different regions shows the results of different tests, because Amel Y variation between individual and populations method of determining the sex of 100% was inaccurate. In some men Amel Y can be removed entirely. This research should be visualized one band on the Y chromosome (DYS19) and the Amelogenin two bands during electrophoresis occurs misidentification of the sample as a woman. Conclusions: Identification of sex using Amelogenin locus and Y chromosomes (DYS19) has six identical and ambiguous results because the two samples shown as the sign of men but visualized as women, another sample was not visualized because of the thick level and concentration of Deoxyribo nucleid Acid (DNA).Keywords: Urine Spot, Sex Determination, Amelogenin, Y chromosome (DYS19).